“The heroes you didn't know you needed.”

High school is hard enough when you're different, but when outcast BFFs Astrid and Lilly accidentally crack open a portal to a terrifyingly quirky monster dimension, it gets a lot more complicated. It's up to them to vanquish the creepy creatures and save the world, becoming the badass heroes they were meant to be. That is, if they can survive the horrors of high school.